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16. YTO Loop Adjustments
RF-Section:
Al
Sampler
YTO Loop Interconnect
Average Noise Level Test
The output power level of the
Coupler/Isolator/Amplifier (CIA)
is checked over the 2.2
to 6.2
tuning range of the All YTO
Loop, and the Al
YTO is tuned to the minimum power frequency.
Then, the CIA GATE BIAS is adjusted for a -5.0
output power
level at the coupled output of the
CIA. The YTO Loop
Sampler is driven by a synthesized sweeper and the dc output of
Sampler Al
is monitored with an oscilloscope. The Sampler Driver
circuit is adjusted for maximum amplitude and flatness over the
range of the
Loop. The YTO Loop Sampler IF amplifiers are then
adjusted for correct output level and frequency response.
Spectrum Analyzer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HP 8566B
Synthesized Sweeper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .HP
Digitizing Oscilloscope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HP
Power Meter/Power Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . HP
SMA (m) 50 ohm Termination . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1810-0118
Adapters:
Type N (m) to APC 3.5 (f) Adapter . . . . . . . . . . . . . . . . . . . 1250-1744
Adapter, BNC to Alligator Clip . . . . . . . . . . . . . . . . . . . . . . 1250-1292
Cables:
Low-loss Microwave Test Cable, APC 3.5 . . . . . . . . . . . . . .
BNC TO SMB Snap-On Test Cable (2
required) . . . . . . . . .
1. Set the spectrum analyzer (DUT) LINE switch to STANDBY. Turn
the spectrum analyzer over to position the RF Section
on
top, as
shown in Figure 3-69. Remove the RF Section’s bottom cover.
2. Disconnect semi-rigid coax cable
from
CIA Assembly’s
YTO OUT connector. Disconnect the opposite end of
from
AT2 (for RF Sections 2526A and below, disconnect from cable
See Figure 3-70 for the location of
and AT2.
Adjustments 3-135
Содержание HP 8566B
Страница 71: ......
Страница 137: ...Test 19 1st LO Output Amplitude Steps Min Measured Max 4 1st LO OUTPUT Level 5 dBm 2 112 Performance Tests ...
Страница 169: ......
Страница 344: ......
Страница 351: ...23 Track and Hold Adjustments 25 Repeat steps 4 through 24 until no further adjustments are required Adjustments 3 211 ...
Страница 404: ...AIVI Wi AlAl ti2 W8 Figure 6 6 IF Section Front View 6 8 Major Assembly and Component locations ...